New Route File Laravel 8

Since you are using a middleware for admin : Route::middleware('admin'), you'd need to add admin to the $middlewareGroups array in app\Http\Kernel.php:

'admin' => []

The error should not appear any more but since you apply the admin middleware to a group of routes, you shouldn't use an empty array and rather put some middlewares in that array.

thanxs @ismaile

But i got this error

InvalidArgumentException Auth driver [eloquent] for guard [admin] is not defined.

@ethar You're welcome.

How does your auth.php look like ?

thanks @ismaile im sorry for late

my auth.php // i add admin guards and providers
    'guards' => [
        'web' => [
            'driver' => 'session',
            'provider' => 'users',
        ],

        'api' => [
            'driver' => 'token',
            'provider' => 'users',
            'hash' => false,
        ],

        'admin' => [
            'driver' => 'session',
            'provider' => 'admin',
        ],

    ],

    'providers' => [
        'users' => [
            'driver' => 'eloquent',
            'model' => App\Models\User::class,
        ],

        'admin' => [
            'driver' => 'eloquent',
            'model' => App\Models\Admins::class,
        ],

in redirectifauthenticated.php

    public function handle($request, Closure $next, ...$guards)
    {
        $guards = empty($guards) ? [null] : $guards;
        if (Auth::guard($guards)->check()) {
            if($guards == 'admin')
                return redirect(RouteServiceProvider::ADMIN);
            else
                return redirect(RouteServiceProvider::HOME);
        }
        return $next($request);
    }

in routeserviceprovider.php

    public const HOME = '/home';
    public const ADMIN = '/admin/dashboard';
    protected $namespace='App\Http\Controllers';

    public function boot()
    {
        $this->configureRateLimiting();

        $this->routes(function () {
            Route::middleware('web')
                ->namespace($this->namespace)
                ->group(base_path('routes/web.php'));

            Route::middleware('admin')
                ->namespace($this->namespace)
                ->group(base_path('routes/admin.php'));

            Route::prefix('api')
                ->namespace($this->namespace)
                ->middleware('api')
                ->group(base_path('routes/api.php'));
        });
    }

admin.php //new route file

Route::group(['prefix'=>'admin','middleware'=>'guest:admin','namespace'=>'Admin'],function(){
    Route::get('/login','LoginController@getAdminPage')->name('admin.login');
    Route::post('/login','LoginController@login')->name('admin.login');
});

new error ErrorException Illegal offset type

@ismaile after change

    public function handle($request, Closure $next, ...$guards)
    {
        $guards = empty($guards) ? [null] : $guards;
        if (Auth::guard($guards)->check()) {
            if($guards == 'admin')
                return redirect(RouteServiceProvider::ADMIN);
            else
                return redirect(RouteServiceProvider::HOME);
        }
        return $next($request);
    }

to

    public function handle($request, Closure $next,$guards=null)
    {
        if (Auth::guard($guards)->check()) {
            if($guards == 'admin')
                return redirect(RouteServiceProvider::ADMIN);
            else
                return redirect(RouteServiceProvider::HOME);
        }
        return $next($request);
    }

problem solved

but i dont think this is best idea

@ethar

Before moving forward, if you don't mind, let's step back a little bit.

How are your admins authenticated ? Is it through the usual login form used by other users ? If that's the case, then maybe there is no need for a dedicated guard for admins.

Besides, what are the fields of your admins table ? Usually, the users table could have a is_admin or admin_at column. In this case, the admins table and its App\Models\Admin model are not necessary.

Maybe what you need is just using the web guard but with authorization to limit access to admin only for specific routes on your site.

Please let me know if that's the case.

@ismaile let me explain

I used the admin route for the control panel /admin/dashboard /admin/login

I create an admin.php file inside the routes folder used for the admin panel route, all admin route(admin panel) not in web.php but in admin.php I created.

I used a dedicated table for admins, not a user's table.

admins have a login page,different from users page users have a specific login page. admins have a specific login page.

now the problem solved after your help and after the change

   public function handle($request, Closure $next,$guards=null)
    {
        if (Auth::guard($guards)->check()) {
            if($guards == 'admin')
                return redirect(RouteServiceProvider::ADMIN);
            else
                return redirect(RouteServiceProvider::HOME);
        }
        return $next($request);
    }